Materials-Risk-Index and Its Application
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概要
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Environmental damage and deforestation occur frequently during ore mining to supply the resource of materials used for nuclear power generation and chemical plants. Further, the air pollution by CO2, SOx, and NOx generated in the production of those materials, affects on the global environment. In order to achieve the sustainable society that does not have a significant impact on the global environment, we have already proposed the material risk indexes which show the materials evaluation at the time of the apparatus design. The indexes consist of three kinds of risks, i. e. the sustainable supply of resources, environmental load during production of material, and toxicity of materials, and the numerical values related to the parameters of these risks were also shown.<br/> In this research, the construction of the database to store the information about three risk indexes was tried after the determination of data structure of the indexes. The relation between the risk indexes and the properties in the heat-resistant materials provided in the Web information was investigated As a result, based on the optimal environmental conformity, it was clarified that the materials selection for the apparatus using at high temperature should be directed toward the use of materials consisted mainly of easily obtainable atomic elements. The validity of the direction was estimated for various stainless steels and it is indicated that the stainless steel replaced Ni with Mn has a good value in the environmental conformity.